To Next PageTo Next Page
Need help?Do you have a question about the Suburban NT-20S/SE and is the answer not in the manual?
Specifies acceptable gas supply pressure ranges for furnace operation.
Details the acceptable DC voltage range for furnace operation.
Lists essential tools needed for servicing the furnace.
Specifications for 12 VDC direct discharge RV furnace models.
Specifications for 12 VDC ducted RV furnace models.
Specifications for 120 VAC park model RV furnace models.
Guidance on choosing an appropriate location for furnace installation.
Critical information regarding furnace venting and air intake.
Details on ensuring proper return air flow for furnace operation.
Instructions and recommendations for furnace ductwork installation.
Detailed instructions for installing vent assemblies on SF and SH series furnaces.
Detailed specifications for the DD-17DSI furnace model.
Specifications for NT-12/16/20S and SE 12VDC furnace models.
Specifications for NT-24/30/34SP and NT-40 furnace models.
Specifications for Park Model P-30S and P-40 furnaces.
Specifications for SF series furnaces, including F models.
Specifications for SFV series furnaces, including F models.
Specifications for SH series furnaces, including F models.
Specifications for the SHD-2542 furnace model.
Details the sequence of events for the Direct Spark Ignition system.
Initial response to thermostat calling for heat.
Pre-purge phase to clear combustion chamber.
Ignition sequence and flame verification process.
Procedure for subsequent ignition attempts if initial fails.
Normal operation during the heating cycle.
Post-heating cycle shutdown and cool-down sequence.
Initial response to thermostat calling for heat for 24 VAC systems.
Pre-purge phase for 24 VAC systems.
Ignition and flame verification for 24 VAC systems.
Subsequent ignition attempts for 24 VAC systems.
Normal heating cycle for 24 VAC systems.
Shutdown sequence for 24 VAC systems.
First stage heating activation for SHD-2542 furnace.
Pre-purge phase for SHD-2542 furnace.
Ignition and flame verification for SHD-2542.
Ignition attempts and lockout procedure for SHD-2542.
Operation during the second stage of heating for SHD-2542.
Post-heating shutdown sequence for SHD-2542.
Troubleshooting thermostat connections and initial power.
Verifying 12VDC power supply to the furnace.
Diagnosing issues with the time delay relay.
Testing limit and sail switch functionality.
Troubleshooting no spark or weak spark at the electrode.
Diagnosing issues with the gas valve opening.
Troubleshooting problems with the main burner flame.
Troubleshooting thermostat and initial power for FCM.
Verifying 12VDC power supply for FCM.
Checking power supply to the module board.
Testing limit and sail switch functionality for FCM.
Troubleshooting no spark or weak spark for FCM.
Diagnosing gas valve issues for FCM.
Troubleshooting flame establishment for FCM.
Precautions for handling electrodes and assemblies.
Safety guidelines for working with the electrode assembly.
Ensuring proper separation between spark and flame sensor.
Troubleshooting steps when the electrode does not spark.
Diagnosing why gas is not supplied to the burner.
Troubleshooting burner ignition failure.
Diagnosing causes for the furnace shutting down into lockout.
Addressing recurring issues with the module board.
Procedures for dealing with moisture in the gas system.
Step-by-step instructions for removing the DD-17DSI furnace.
Instructions for removing NT-12/16/20S furnace models.
Instructions for removing NT-12/16/20SE furnace models.
Steps for removing NT-24/30/34SP and NT-40 furnaces.
Removal instructions for SF, SFV, SH, and SHD series furnaces.
Removal instructions for SF, SFV, SH 'F' models.
Instructions for removing P-30S and P-40 furnace models.
Procedure for locating burner ports for electrode placement.
Correctly positioning the electrode for ignition.
Ensuring the correct spark gap for the electrode.
Specifies the 1/8" spark gap for NT series electrodes.
Specifies electrode position for NT series furnaces.
Specifies the 1/8" spark gap for Park Model electrodes.
Specifies the 1/4" gap for Park Model flame sensors.
Specifies electrode position for Park Model furnaces.
Instructions for cleaning the blower wheel and sail switch.
Checking and replacing furnace gaskets.
Steps for cleaning the furnace chamber.
Warnings about using battery chargers and voltage levels.
Safety precautions regarding electrode wire and assembly.
Guidance on tool usage for the electrode assembly.
Warning about spark interaction with flame sensor.
Ensuring electrical components are protected from water.
Recommendation for direct battery wiring.
Correct method for tightening gas fittings.
Ensuring correct voltage and compatibility.
Prohibition against unauthorized furnace modifications.
Restrictions on furnace venting locations.
Meeting minimum duct and return air requirements.
Importance of correct furnace installation and venting.
Prohibition against installing aftermarket components.
General
